Machine for attaching spring ends.



E. E. EYSTER.

MACHINE Fon ATTACHING SPRING ENDS.

APPLICATION lFILED MAY 22,1911. N

Patented Dec. 14', 1918.

1528?931 3 sNEETs-sHEET 1 E. E. EYSTER.

MACHINE FOR ATTACHING sPRlNG ENDS.

APFLXCAUON FILED MAY 22, 19H. LZSTAQSL Fatemi Dec. 17, 191s.

E. EA EYSTER.

MACHINE FOR ATTACHING SPRING ENDS.

APPLICATION FILED .mm/22,1911.

Lg'gl Putoutud Doc. 1T, v1918.

3 SHEETS-SHEET 3V ffy@ A T TO R/VE YS.

ELMER EYSTER, INDIANAPOLIS, INDIANA.

MACHINE FOR ATTACHING- SPRING ENDS.

Specicaton of Letters Patent.

Patented Dec. 17, 1918.

Application led May 22, 1917. Serial No. 170,323.

To all whom t may concern:

Be it known that I, ELMER E. EYSTER, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented certain new and useful Improvements in Machines for Attaching Spring Ends, of which the following is a specification.

This invention relates to a machine for attaching to the adjacent convolutions the free ends of a type of coil springs as are commonly employed in bed-springs, cushions and the like.

In machines heretofore for effecting the above results, it has been customary to initially place the springs into a movable positioning-anvil, for accurately determining the desired position the springs should occupy before moving them to a point where the aihxing of the free ends is eEected by the twister-mechanism. During this movement of the positioning-anvil toward the twistermechanism, whereby the springs are moved bodily toward the twister-mechanism, many of the springs became displaced in the anvil and were mutilated and unt for use, for the reason that the springs were partially obscured by the twister-mechanism, giving the operator no opportunity for correcting the position of the displaced springs.

The present machine contemplates a structure wherein the positioning-anvil for the springs remains in a fixed position while the twister-mechanism advances toward said anvil in operating upon the springs. That is to say, in previous machines the objects acted upon moved toward the twister-mechanism, whereas in the present machine the objects acted upon remain in a fixed position while the twister-mechanism advances toward the anvil to. act upon the fixed objects.

One of the objects of the present invention consists in the provision of a machine of the above character wherein the springs acted upon are easily positioned in a predetermined Xed position and under constant 0bservation by the operator until acted upon, the twister mechanism moving toward and acting upon the fixed springs.

A further object of the invention consists in the provision of a machine of the above character which is simple in construction, easy to operate and eflicient in its operation.

I accomplish the above objects of the invention, and such others as may appear from a perusal of the specification and claims, by means of the construction illustrated in the accompanying drawings, forming a part hereof, in which- Figure l is a perspective view of the knot twister machine, showing the position of the parts when the knot is twisted. Fig. 2 is a fragmentary detail perspective view of the upper portion of the machine, showing the twister-mechanism at the end of its stroke farthermost from the positioninganvil. Fig. 3 is a view similar to Fig. 2 except that the table-top of the machine is elevated to expose the parts underneath. Fig. 4 is a top or plan view of the machine, showing the initial position of the free end of the spring. Fig. 5 is a sectional view through the twister wheel, on the line 5 5 in Fig. 6, showing the twister head in its forward position with the free end of the spring bent toward the axis of the latter, and immediately preceding the operation of twisting said bent end around the adjacent convolution of the spring. Fig. 6 is a cross section of the machine, on the line 6 6 in Fig; 4, showing the twister head at the end of its stroke farthermost from the anvil. Fig. 7 is a veiw similar to Fig. 6 except that the twister head is shown at the innermost end of its stroke where the twisting operation is effected. Fig. 8 is a fragmentary detail in side elevation, as seen from the line 8--8 in Fig. 4. Fig. 9 is a perspective view of the twister head in which the remaining parts of the machine are omitted. Fig. 10 is a side elevation of the twister head. Fig. 11 is a front elevation of the twister head. Fig. 12 is a vertical section throughthe head, on the line 12-12 in Fig. 10. Fig. 13 is a side elevation of the twister wheel, as seen from the line 13-13 in Fig. 14. Fig. 14 is a front elevation of the twister wheel, as seen from the line 14-14 in Fig. 13. Fig. 15 is a fragmentary detail view, showing the finished twisted knot whereby the free ends of the spring are secured to the adjacent convolutions of the spring. v

Referring to the accompanying drawings, the present machine is of the pedestal type, permitting the operator to assume a sitting position, consisting of a base 20. Mounted upon the pedestal 20 is the upper frame 21 including the upright standards 22 and 23.

rihese standards are provided with suitable journal-boxes 24 for supporting the shaft 24, the upper ends of the standards carrying a table-top 25 above the surface of which the worlr upon the springs 27 is performed. Shaft 24 is driven through a pulley 26 mounted on shaft 28, and interposed between the adjacent ends of shafts 24 and 28 is a clutch 29 of any suitable type, whereby movement of rotation can be imparted to shaft 24 when desired through the medium of foot-pedal 30, connecting-rod 31 and arm 32. Shaft 24 carries a fixed diskwheel 35 having a cam-groove 36 in its side, and riding in groove 36 is a friction roller 37 mounted at one side of the axis of an oscillati twister head 40, the latter carrying suitable wire twister mechanism to be hereinafter described. Twister head 40 oscillates about a stud-shaft 41 anchored in upright standard 22, and the upper end of said twister head, carrying the twister mechanism, extends above the table-top 25 through an opening 43 in the latter so that the operation of the twister mechanism upon springs 27 is effected above the top of table 25. Twister head 4() is provided with an internally located pinion 45 which is loosely mounted upon stud-shaft 41, and said pinion is intermittentlyT moved a complete revolution about its axis in a given direction through the mediumV of a mutilated pinion 46 carried by shaft 24. The number of teeth carried by the mutilated pinion 46 equal the total number of teeth carried by pinion 45, thereby insuring a complete revolution of pinion 45 at each successive engagement between the teeth of the pinions and no more. 1n order to halt pinion 45 at a predetermined position at the conclusion of each movement of the latter, thereby insuring proper registration of twister wheel at all times, pinion 45 is provided with a recess 48 into which a spring seated pawl 49 is forced, when the two register, under the influence of spring 50. See Fig. 12. Arranged within head 40 and above its axis and meshing with pinion 45 is a twister wheel 55 through the action of which the free ends of the springs 27 are attached to the adjacent convolutions of the latter. The number of teeth carried by twister wheel 55 equal one-half the number of teeth carried by the pinion 45, whereby two complete revolutions of the twister wheel is insured with each complete rotation of pinion 45, this movenient of twister wheel 55 being sufficient to wrap the free ends of springs 27 two full turns about the second convolutions of said springs. Twisterv head 40 is cut away and notched as at to permit the introduction of the convolutions of springs 27 into the channel 62 extending ,from the periphery of twister wheel'55 to its axis.

The ends of springs 2'? are properly posi- Las/,esi

tioned by means of a shoulder 63 on head ,40 (Fig. 9), and the amount of wire to be employed in forming the twist or lrnot 64 (Fig. 15) is determined by means of gage 65. Gage 65 is capable of being adjusted transversely of head 40 toward and away from the olf-set corner 67, of shoulder 63, where the bending of the wire is effected as head 40 moves forward, by means of slots 68 and screws 6), all as clearly shown in Fig. 9. Vhen a spring 27 is placed into position to be operated upon, the free end of the latter is passed between a permanent guide-lug 70, formed integrally with table-top 25, and lug 72 arranged on anvil 7?, and the second convolution of the spring is passed between lug 72 and the anvil-lug 7 `When head 40 moves forward the free end of spring 27 is brought into contact with the adjacent edge of anvil-lug 75 where the body of the spring is arrested, the free end of the spring being bent forward in the direction of the traveling head 40 toward the limit of its forward travel. See Fig. 5. Twister wheel 55 is provided in one side along slot 62 with a recess 77 adapted to receive t-he bent end of spring 27, leaving the bent end of the spring in position to be acted upon by wheel 55 when the latter reaches the forward limits of its travel. During this forward movement of twister wheel 55 the adjacent convolution of spring 27 enters slot 62 in wheel 55, and at the end of said forward travel the several parts occupy approximately the positions shown in Fig. 5. When the twister wheel 55 reaches the limit of its forward travel,

,with the bent end of sprin -27 restino* in channeled recess 77 of twister wheel 55, the teeth on mutilated pinion 46 are moving into` engagement with pinion 45, and with one complete revolution of the .latter pinion twister wheel 55 is given two complete revolutions about its axis which is suiiicient movement to completely wind the bent end of spring 27 around the adjacent convolution of the latter. At the conclusion of the winding operation of twister wheel 55 slot 62 will be in registration with notch 60 in head 40, allowing twister wheel 55 to readily free itself from spring 27 as head'40 moves baclr'to its normal position. After upending the spring, or substituting another of the springs as circumstances necessitate, the above described operation is repeated.

Having thus fully described my said` invention, what l desire to secure by Letters Patent, is-

l. A. machine of the herein described class comprising means for initially Ypositioning and holding stationary a coil spring to be acted upon, aY movable head engaging and bending the adjacent end ofthe spring transversely across the succeeding convolution .of the latter, twister-mechanism mounted in said head for" twisting the transverse bent end of the spring around said succeeding convolution, means for imparting a determined distance of movement of rotation to said twister-mechanism, and means for actuating said head to move said twistermechanism into and out of operative relation of the spring.

2. A machine of the herein described class comprising means for initially positioning and holding stationary a coil spring to be acted upon, a movable head engaging and bending the adjacent end of the spring transversely across the succeeding convolution of the latter, means for determining the amount of wire employed in the transverse bend, twister-mechanism mounted in said head for twisting the transverse bent end of the spring around said succeeding convolution, means for imparting a determined distance of movement of rotation to said twister-mechanism, and means for actuating said head to move said twister-mechanism into and out of operative relation of the spring.

3. A machine of the herein described class comprising means for intially positioning and holding stationary a coil spring to be acted upon, a movable head carrying wire twister-mechanism, means for engaging and bending the adjacent end of the spring transversely of the succeeding convolution during the advance movement of said head, Wire twister-mechanism engaging the bent end of the spring, means for rotating said twister-mechanism for twisting said bent end around the succeeding convolution, and means for actuating said head to move said twister mechanism into and out of operative relation of the spring.

In witness whereof, I have hereunto set my hand and seal at Indianapolis, Indiana, this 19th day of May, A. D. one thousand nine hundred and seventeen.

ELMER E. EYSTER. [1.. s]

Copies of this patent may be obtained for ve cents each, by addrssng the Commissioner of Patents, Washington, D. G. 

